/* 设计令牌 */
:root {
  --primary-color: #1a1a1a;
  --secondary-color: #f8f8f8;
  --accent-color: #d4af37;
  --text-primary: #2c2c2c;
  --text-secondary: #666666;
  --border-color: #e5e5e5;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --border-radius: 4px;
  --transition: all 0.3s ease;
}

/* 全局样式 */
body {
  font-family: "PingFang SC", "Source Han Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--secondary-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 导航栏样式 */
nav {
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav ul {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: var(--spacing-sm) 0;
}

nav li {
  margin: 0 var(--spacing-md);
}

nav a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: var(--transition);
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* 主容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* 主视觉区域 */
.hero {
  position: relative;
  height: 90vh;
  min-height: 600px;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.hero:hover .hero-image {
  transform: scale(1.05);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.6) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  text-align: center;
  color: white;
  z-index: 1;
  padding: var(--spacing-md);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.1em;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 300;
  opacity: 0.9;
  letter-spacing: 0.05em;
}

/* 标题样式 */
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 300;
  text-align: center;
  margin: var(--spacing-lg) 0 var(--spacing-md);
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

/* 网格布局 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.grid-item {
  overflow: hidden;
  border-radius: var(--border-radius);
  background: white;
  transition: var(--transition);
}

.grid-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.grid-item img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: var(--transition);
}

.grid-item:hover img {
  transform: scale(1.05);
}

.grid-item-content {
  padding: var(--spacing-md);
}

.grid-item-title {
  font-size: 1.2rem;
  font-weight: 400;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.grid-item-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 卡片样式 */
.card {
  background: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.card-image {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-lg);
}

.card-title {
  font-size: 1.8rem;
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.card-text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

/* 工艺展示 */
.craft-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.craft-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  aspect-ratio: 1;
}

.craft-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.craft-item:hover img {
  transform: scale(1.1);
}

.craft-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
  color: white;
  padding: var(--spacing-md);
  transform: translateY(100%);
  transition: var(--transition);
}

.craft-item:hover .craft-overlay {
  transform: translateY(0);
}

/* 页脚 */
footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  background-color: var(--primary-color);
  color: white;
  margin-top: var(--spacing-lg);
}

/* 响应式设计 */
@media (max-width: 768px) {
  nav ul {
    flex-wrap: wrap;
  }
  
  nav li {
    margin: var(--spacing-xs) var(--spacing-sm);
  }
  
  .hero {
    height: 70vh;
    min-height: 500px;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .craft-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }
  
  .hero-subtitle {
    font-size: 0.9rem;
  }
  
  .craft-grid {
    grid-template-columns: 1fr;
  }
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.8s ease forwards;
}

/* 微交互 */
.button {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

.button:hover {
  background-color: var(--accent-color);
  transform: translateY(-2px);
}

/* 图片占位符优化 */
img {
  loading: lazy;
}